i think the most proper way is to use the same piece of code angular use when doing a "get" request using you $httpParamSerializer will have to inject it to your controller so you can simply do the following without having to use Jquery at all , $http.post(url,$httpParamSerializer({param:val}))
app.controller('ctrl',function($scope,$http,$httpParamSerializer){
$http.post(url,$httpParamSerializer({param:val,secondParam:secondVal}));
}